Electrical controlling means



Nov, V21), 1923, 1,474,447

Cl. 5. SCHROEDER ELECTRICAL CONTROLLING-'MEANS Fil ed Aug. 18 1921 Patented Nov. 2@, 1923.

rarest eas est CHARLES' -S. SCHROE'DER, OF'STAMFOR-D, CONNECTICUT, ASSIGNOB TO THE YALE &'

TOWNE MANUFACTURING COMPANY, OF

STAMFORD, CONNECTICUT.

ELECTRICAL CONTROLLING MEANS.

Application fi1ed August 18, 1921.

To all whom it may concern:

Be it known thatI, CHARLES S. Sermon- DER, a citizen of the United States, and a resident of Stamford, in the county of F air-- field and State of Con-necticut, have invented certain new and useful Improvements in Electrical Controlling Means; and I do hereby declarethe following to be a full, clear, and exact description of the invention, such as will enable others skilled in' the art to which it ap'pertains to makeand use the same.

This invention relates to improvements in electrical controlling means, and more particularly to means for controlling the operation of a cut-out switch when the same is associated with an electrical controller in the motor circuit.

One object of my present invention is to provide simple and efiicient means'cooperable with a moving part of an electrical controller and with the movable member of a cut-out switch associated therewith, to prevent, the closing ofsaid switch (when the same shall have been previously opened by the operation of brake-controlling means while the controller is at an on position) until the controller drum is returned to off or first running position, whereby the closing of the motor circuit is prevented while the brake is ap plied and the controller' drum is at other than"off or first running position.

A further object is to-so construct andar range my improvements that the closing of the cut-out switch shall be. controlled by drum of an electrical controller, so that said switch will betripped and permitted to close when said controller drum is returned to-Oii or first running position.

With these and other objects inview, the invention consists in certain. novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view illustrating the application of my invention; Figure 2 is an enlarged View showing features of my improvements.

In Figure 1 of the drawings, I have shown the application of my invention to an electrical controller and'mechanical'brake mechanism forfan electrically driven indus- (not shown) Serial No. 493,384.

trial truck,a portion of the -framework of the latter being indicated at 1; the electrical controller at 2, and the brake at 3.

- The electrical controller may be of the drum type and it will be included in the H10"? tor circuit in the usual manner. A cut-out switch 4 is also includedin the motor circuit to effect the opening and closing of the latter under certain conditions. The details of construction of the controller drum and its cooperating contact fingers do not constitute parts of my present invention andneed not be specifically described and illustrated herein to enable any one skilled in the art to make and use my improvements, nor is it necessary to show and describe the mannor in which the controller and its out out switch are included in circuit with a motor, as these features are well understood in the art and may be of any preferred construction and arrangement.

In the drawings, 1 have indicated the drum shaft at a") and the operating shaft at 6,-it being understood that. suitable gearing will be provided for transmitting motion from the operating shaft to the drum,all mounted in a suitable frame '01 casing 7.

The movable member 4 'of the cut-out switch 4 is supported by a carrier 8 mounted loosely on the operating shaft (5 and pro- .vidcd with a fixed lug A spring 10 connected with the carrier 8 is operable to retain the cut-out switch losed or to close the s'a1ne.'

In the drawing, a portion of the controller drum is indicated at 11 and connected to the drum shaft 5 by means of a pin. 12. The

portion 11 of the-drupi is provided with a fixed lug l3.

Pivotally mounted on. a

stud 1 L supported by the framework l intermediate of the drum and operating shafts, is a bell-cranklever l5,the arm 16 of which is normallv disposed adjacent to the lug 9 on the switch member carrier 8, and the arm 1 has a projection 1T located adjacent to the part 11 of the -controller. When the drum is at of? position and the cut-o'ut switch. is closed as illustrated in Figure 2, the lug 13 on the controller drum will be inengagement with the projection 17 of lever arm released when said pedal is depressed. 5,

1 In Figure Q-nected, by a rod 17, and the bell-crank lever will be held against the action of a spring-118 between the lever arm 17 and the irarn'e or casing7; in such position that-"the arm 16 of the bellcrank lever-will be disposed out oi the path of'thelug 9 onthe carrier 8.

frame of the truck, and arms 20 and 21. The pedal arm20 is conor link 22iwith a lever 23 of the mechanical brake 3, and the spring 3 of said brake ment of the pedal when the brake is applied upon release of the pedal,-said brakebeing i The arm 21 of the brake pedal 19 is connected by a rod 24: with one arm of a cam lever 25 mounted freely on the drum shaft 5 of the controller, and the other arm of said cam lever" is cooperable' with a roller 26 mounted on the carrier .8 of the movable member of the cut-out switch. I

' ning position, the lug drum is so operated, the cam or lug 13 rom the construction and arrangement of parts above that when the brake pedal is-in depressed osition as shown in Figure 1, the mechanical brake will be in released position; the

cam lever 25 will be out of the path of-the' roller on the carrier 8, and the cut-out switch will ,be closed. pedal is released so that it may risen-s l1l(ll cated b the arrowon'Fig. 1, the brake will be applied and motion will be imparted through the arm 21 and rod24 to the cam lever 25 and causethe latter to move the carrier '8 in a manner to open the cut-out switch. When the carrier 8 is thus moved, the lug 9 thereon will rise and, if the controller drum is at other than off or first runpath of the projection 17 of the lever-ar1n 17 and the spring 18 will cause the arm 16 oflthe bell-crank to the lug 9 of the carrier 8 and thus hold the cut-out switch open. It will be seen that under the conditions bellcrank-lever will act, in eifect, as 'a spring-pressed latch. so that as the carrier 8 is turned to open'the cut out switch, the lug 9 Willride past the arm 16 and then become disposed-over it, andthus the cut-out switch will become latched in open position.

I Before the motor circuit can be closed,

the controller must be returned to on or first running position.

When the controller carried'thereby will engage the projection of lever arm' 17 and thus move the bell- 0n the carrier, permit the switch to ofthesp'ring 10.

cranl c-lever against the resistance of the spring 18, out 7 thus releasing the latter and be closed by the action It w1ll be seen that my improvements .1 of the drafiwingfl-ha-ve shown a brake pedal19 suitably supported by the provided with two will be operable tocause moveti'oller when the same is inoved-back to or to fofi position, to trip the 'li-ng means cooperable with the movable described, it will be apparent When the brake.

13 will be out oi the.

become disposed under above described, the

of engagement with the lug 9 image?- serve to prevent" the motor from being started while the brake is applied and the controller drum is at other than fof? or first running positiom. p

fully described my invention,

Having Y whatl claim as new and desire to secure by Letters Patent, is 7 1. The combination with an electrical controller, a cut-out switch, means tending to close said switch, and switch operating means, of a latch operable to hold the switch openafter it; shall liave be'en previously opened by said operating means, and means operable by movable member of the (onapproximately latchand permitthe switch to close.

2. The combination with an electrical e'on- Y troller, a cut-out switch, and brake controltrollingmeans, and means-operable by saidbrake controlling means to move the movable member of the cut-out switch to open the latter, of a spring-pressed latch between the controller drum and the movable mem-. ber of the cut-out switch to latch the latter I in open position and means operable by the p i controller drum v to release the movable member of the cut- 9 to operate said latch ,dcvice out switchand permit the-latter to close.

' t. The combination with an electrical con-:. troller having a drum and, an operating r shaft, and a cut-outswitch, of a carrier for 'the movable member of the "cut-out switch,

movably. mounted on said operating shaft, a lug on said carrier,brake controlling means to move said carrier .to open the cut-out switch, a spring-pressed latch to cooperate with the lug on the open, and a part movable with the controller drum to trip the latch and permit thecutout switch to close.

5. The combinaton with an electrical controllerf including a drum and an operating shaft, brake controlling means including a brake pedal, and a cut-out switch associated with th controller, of a carrier for the movable member of the cut-out switch, movably,

mountedon the operating shaft, a cam lever movably mounted on the shaft of the drum and cooper able with said carrier, means connecting said cam lever with the brakeand permit the cut-out carrier to hold the switch 115 pedal whereby operation of the latter to J cause the brake to be applied will cause said 130.

cani lever to move said'carrier to open the cut-out switch, a, spring-pressed latch cooperable with the carrier to hold the cut-out switch open, and means movable with the controller drum. to trip said latch and permit the cut-out switch to close.

I11 testimony whereof, I have signed this mg witnesses.

CHARLES Witnesses:

WM. H. DONALDSON, CHARLES A. BERRY.

S. SCHROEDER. 

